<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb>
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>用户管理</el-breadcrumb-item>
            <el-breadcrumb-item>用户列表</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图区 -->
        <el-card>
            <el-row :gutter="20">
                <el-col :span="8">
                    <!-- 搜索与添加区域 -->
                    <el-input placeholder="请输入内容" v-model="queryInfo.query" clearable @clear="getUserList">
                        <el-button slot="append" icon="el-icon-search" @click="getUserList"></el-button>
                    </el-input>
                </el-col>
                <el-col :span="4">
                    <el-button type="primary" @click="dialogVisible=true">添加用户</el-button>
                </el-col>
            </el-row>
            <!-- 用户列表区域 -->
            <el-table :data="userList" border stripe>
                <el-table-column type="index" label="#"></el-table-column>
                <el-table-column prop="username" label="姓名"></el-table-column>
                <el-table-column prop="email" label="邮箱"></el-table-column>
                <el-table-column prop="mobile" label="电话"></el-table-column>
                <el-table-column prop="role_name" label="角色"></el-table-column>
                <el-table-column prop="mg_state" label="状态">
                    <template slot-scope="scope">
                        <!-- {{ scope.row }} -->
                        <el-switch v-model="scope.row.mg_state" @change="userStateChange(scope.row)"></el-switch>
                    </template>
                </el-table-column>
                <el-table-column label="操作" width="180px">
                    <template slot-scope="scope">
                        <!-- 修改按钮 -->
                        <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.id)"></el-button>
                        <!-- 删除按钮 -->
                        <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeUserById(scope.row.id)"></el-button>
                        <!-- 分配角色按钮 -->
                        <el-tooltip effect="dark" content="分配角色" placement="top" :enterable="false">
                            <el-button size="mini" type="warning" icon="el-icon-setting" @click="setRole(scope.row)"></el-button>
                        </el-tooltip>
                    </template>
                </el-table-column>
            </el-table>
            <!-- 分页区域 -->
            <el-pagination
                :current-page="queryInfo.pagenum"
                :page-sizes="[1, 2, 5, 10]"
                :page-size="queryInfo.pagesize"
                layout="total, sizes, prev, pager, next, jumper"
                :total="total"
                @size-change="handleSizeChange"
                @current-change="handleCurrentChange">
            </el-pagination>
        </el-card>

        <!-- 添加用户的对话框 -->
        <el-dialog
            title="添加新用户"
            :visible.sync="dialogVisible"
            width="50%"
            :close-on-click-modal="false"
            :close-on-press-escape="false"
            @close="onDialogClose">
            <!-- 内容主体区域 -->
            <el-form :model="addForm" :rules="addFormRules" ref="ruleFormRef" label-width="70px">
                <el-form-item label="用户名" prop="username">
                    <el-input v-model="addForm.username"></el-input>
                </el-form-item>
                <el-form-item label="密码" prop="password">
                    <el-input type="password" v-model="addForm.password"></el-input>
                </el-form-item>
                <el-form-item label="邮箱" prop="email">
                    <el-input v-model="addForm.email"></el-input>
                </el-form-item>
                <el-form-item label="手机" prop="mobile">
                    <el-input v-model="addForm.mobile"></el-input>
                </el-form-item>
            </el-form>
            <!-- 底部区域 -->
            <span slot="footer" class="dialog-footer">
                <el-button @click="dialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addUser">确 定</el-button>
            </span>
        </el-dialog>
        <!-- 修改用户的对话框 -->
        <el-dialog
            title="修改用户"
            :visible.sync="editDialogVisible"
            width="50%"
            :close-on-click-modal="false"
            :close-on-press-escape="false"
            @close="editDialogClose">
            <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="70px">
                <el-form-item label="用户名">
                    <el-input v-model="editForm.username" disabled></el-input>
                </el-form-item>
                <el-form-item label="邮箱" prop="email">
                    <el-input v-model="editForm.email"></el-input>
                </el-form-item>
                <el-form-item label="手机" prop="mobile">
                    <el-input v-model="editForm.mobile"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="editDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="editUserInfo">确 定</el-button>
            </span>
        </el-dialog>
        <!-- 分配角色的对话框 -->
        <el-dialog title="分配角色" :visible.sync="setRoleDialogVisible" width="50%" @close="onRoleDialogClosed">
            <div>
                <p>当前的用户：{{ userInfo.username }}</p>
                <p>当前的角色：{{ userInfo.role_name }}</p>
                <p>分配新角色：
                    <el-select v-model="selectRoleId" placeholder="请选择">
                        <el-option
                        v-for="item in roleList"
                        :key="item.id"
                        :label="item.roleName"
                        :value="item.id">
                        </el-option>
                    </el-select>
                </p>
            </div>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRoleDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="saveRoleInfo">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>

<script>
export default {
    data() {
        // 验证邮箱的规则
        var checkEmail = (rule, value, callback) => {
            // 验证邮箱的正则表达式
            const regEmail = /^[A-Za-z\d]+([-_.][A-Za-z\d]+)*@([A-Za-z\d]+[-.])+[A-Za-z\d]{2,4}$/
            if(!regEmail.test(value)) {
                return callback(new Error('请输入合法的邮箱'))
            }
            callback()
        }
        var checkMobile = (rule, value, callback) => {
            const regMobile = /^[1][3,4,5,7,8][0-9]{9}$/
            if(!regMobile.test(value)) {
                return callback(new Error('请输入正确的手机号'))
            }
            callback()
        }
        return {
            // 获取用户列表的参数对象
            queryInfo: {
                query: '',
                // 当前页码
                pagenum: 1,
                // 当前页显示的条数
                pagesize: 2
            },
            userList: [],
            total: 0,
            // 控制添加用户对话框的显示与隐藏
            dialogVisible: false,
            addForm: {
                username: '',
                password: '',
                email: '',
                mobile: ''
            },
            addFormRules: {
                username: [
                    { required: true, message: '请输入用户名', trigger: 'blur' },
                    { min: 2, max: 10, message: '用户名长度在2~10个字符之间', trigger: 'blur' }
                ],
                password: [
                    { required: true, message: '请输入密码', trigger: 'blur' },
                    { min: 6, max: 16, message: '密码长度在6~16个字符之间', trigger: 'blur' }
                ],
                email: [
                    { required: true, message: '请输入邮箱', trigger: 'blur' },
                    { validator: checkEmail, trigger: 'blur' }
                ],
                mobile: [
                    { required: true, message: '请输入手机号', trigger: 'blur' },
                    { validator: checkMobile, trigger: 'blur' }
                ]
            },
            // 控制修改用户对话框的显示与隐藏
            editDialogVisible: false,
            editForm: {},
            editFormRules: {
                email: [
                    { required: true, message: '请输入邮箱', trigger: 'blur' },
                    { validator: checkEmail, trigger: 'blur' }
                ],
                mobile: [
                    { required: true, message: '请输入手机号', trigger: 'blur' },
                    { validator: checkMobile, trigger: 'blur' }
                ]
            },
            // 控制分配角色对话框的显示与隐藏
            setRoleDialogVisible: false,
            // 需要被分配角色的用户信息
            userInfo: {},
            // 所有角色列表数据
            roleList: [],
            // 已选择的角色 id 值
            selectRoleId: ''
        }
    },
    created() {
        this.getUserList()
    },
    methods: {
        async getUserList() {
            const { data: res } = await this.$http.get('users', { params: this.queryInfo } )
            // console.log(res);
            if(res.meta.status !== 200) {
                this.$message.error('获取管理员数据失败！')
            }
            this.userList = res.data.users
            this.total = res.data.total
        },
        handleSizeChange(newSize) {
            // console.log(newSize);
            this.queryInfo.pagesize = newSize
            this.getUserList()
        },
        handleCurrentChange(newPage) {
            // console.log(newPage);
            this.queryInfo.pagenum = newPage
            this.getUserList()
        },
        // 监听 switch 状态变化的改变
        async userStateChange(userInfo) {
            const { data: res } = await this.$http.put(`users/${userInfo.id}/state/${userInfo.mg_state}`)
            if(res.meta.status !== 200) {
                userInfo.mg_state = !userInfo.mg_state
                this.$message.error('更新用户状态失败！')
            }
            this.$message.success('更新用户状态成功！')
        },
        // 监听添加用户对话框的关闭事件
        onDialogClose() {
            this.$refs.ruleFormRef.resetFields()
        },
        // 添加新用户
        addUser() {
            this.$refs.ruleFormRef.validate(async valid => {
                if(!valid) return
                // 发起添加新用户的请求
                const { data: res } = await this.$http.post('users', this.addForm)
                // console.log(res);
                if(res.meta.status !== 201) {
                    return this.$message.error('添加新用户失败！')
                }
                this.$message.success('添加新用户成功！')
                this.getUserList()
                this.dialogVisible = false
            })
        },
        // 显示修改用户对话框
        async showEditDialog(id) {
            const { data: res } = await this.$http.get('users/' + id)
            console.log(res);
            if(res.meta.status !== 200) {
                return this.$message.Error('查询用户信息失败！')
            }
            this.editForm = res.data
            this.editDialogVisible=true
        },
        // 监听修改用户对话框的关闭事件
        editDialogClose() {
            this.$refs.editFormRef.resetFields()
        },
        // 修改用户信息
        editUserInfo() {
            this.$refs.editFormRef.validate(async valid => {
                // console.log(valid);
                if(!valid) return
                // 发起修改用户信息的数据请求
                const { data: res } = await this.$http.put('users/' + this.editForm.id, 
                    { email: this.editForm.email, mobile: this.editForm.mobile })
                if(res.meta.status !== 200) {
                    this.$message.error('更新用户信息失败！')
                }
                // 关闭对话框
                this.editDialogVisible = false
                // 刷新数据列表
                this.getUserList()
                // 提示修改成功
                this.$message.success('更新用户信息失败！')
            })
        },
        // 根据ID删除对应的用户信息
        async removeUserById(id) {
            const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(error => error)
            // console.log(confirmResult);
            // 如果用户确认删除，则返回值为字符串 confirm
            // 如果用户取消了删除，则返回值为字符串 cancel
            if(confirmResult !== 'confirm') {
                return this.$message.info('已取消了删除！')
            }
            const { data: res } = await this.$http.delete('users/' + id)
            if(res.meta.status !== 200) {
                return this.$message.error('删除用户失败！')
            }
            this.getUserList()
            this.$message.success('删除成功！')
        },
        // 显示分配角色对话框
        async setRole(userInfo) {
            this.userInfo = userInfo
            const { data: res } = await this.$http.get('roles')
            if(res.meta.status !== 200) {
                return this.$message.error('获取角色列表失败！')
            }
            this.roleList = res.data
            this.setRoleDialogVisible = true
        },
        // 分配角色
        async saveRoleInfo() {
            if(!this.selectRoleId) {
                return this.$message('请选择要分配的角色！')
            }
            const { data: res } = await this.$http.put(`users/${this.userInfo.id}/role`, { rid: this.selectRoleId })
            if(res.meta.status !== 200) {
                this.$message.error('分配新角色失败！')
            }
            this.$message.success('分配新角色成功！')
            this.getUserList()
            this.setRoleDialogVisible = false
        },
        // 监听角色对话框关闭事件
        onRoleDialogClosed() {
            this.selectRoleId = ''
            this.userInfo = {}
        }
    }
}
</script>

<style lang="less" scoped>

</style>